B0064 Airbag Diagnostic Trouble Code (DTC)

The B0064 Diagnostic Trouble Code (DTC) indicates that the Supplemental Restraint System (SRS) has detected a malfunction in one of the airbag deployment circuits or crash sensor circuits. The exact description of B0064 varies by vehicle manufacturer, but it is commonly related to impact sensors, side airbags, or the Airbag Control Module.

Symptoms

✔ Airbag (SRS) warning light illuminated

✔ B0064 stored in the SRS control module

✔ Airbag protection may be disabled

✔ Additional SRS fault codes may also be present

Common Causes

• Faulty crash (impact) sensor.
• Damaged side airbag wiring.
• Open or short circuit in the SRS harness.
• Loose, corroded, or damaged connector.
• Clock spring failure (if applicable).
• Defective Airbag Control Module (ACM, RCM, SDM, ORC).

Typical SRS Signal Path

Crash Sensor
      │
      ▼
SRS Wiring Harness
      │
      ▼
Airbag Control Module
      │
      ▼
Airbag Warning Lamp

Diagnostic Procedure

1. Scan the vehicle using an SRS-compatible diagnostic tool.
2. Record all stored and pending DTCs.
3. Inspect crash sensor connectors and terminals.
4. Check wiring continuity and insulation.
5. Verify battery voltage, module power, and ground circuits.
6. Repair wiring or replace faulty components as necessary.
7. Clear DTCs and verify proper SRS operation.

Safety Precautions

Always disconnect the negative battery terminal and wait the manufacturer-specified time before servicing SRS components. Never apply voltage or resistance testing directly to an airbag inflator or seat belt pretensioner.

Related DTCs

B0061

B0062

B0063

B0065

B0066

Frequently Asked Questions

Is B0064 a serious fault?

Yes. The airbag system may not deploy correctly during a collision, reducing occupant protection.

Can damaged wiring trigger B0064?

Yes. Wiring faults, connector corrosion, and loose terminals are among the most common causes.

Will replacing the crash sensor always fix B0064?

No. Proper diagnosis should include checking the wiring, connectors, clock spring, and Airbag Control Module before replacing any components.

Note: The exact meaning of B0064 depends on the vehicle manufacturer. Circuit layouts, pinouts, resistance specifications, and diagnostic procedures vary between makes and models, so always consult the factory service manual when performing repairs.